You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to change my reservation as I am not able to make my trip. Can you help me with that?

ASSISTANT: May I know your name please?

USER: Sure, my name is Matthew Walker.

ASSISTANT: Ok, I have found your previous reservation. Can you please tell me your travel dates?

USER: Sure, my travel dates are Feb 29 and Mar 02.

ASSISTANT: Ok, which airports do you prefer?

USER: My airport codes are HOU and IAD.

ASSISTANT: Do you have any specification about airlines?

USER: I am comfortable with any of the airlines.

ASSISTANT: Ok, how many connections do you require in between your journey?

USER: I need connecting flight for my journey.

ASSISTANT: Ok, please wait a minute. In the meanwhile, tell me your other specifications if any?

USER: I do not have any other requirements.

ASSISTANT: There is a  flight in Southwest airlines which is having  a single connection and the ticket cost is 200 in an economy class. Shall I proceed to reserve the ticket?

USER: Yes, do proceed with the reservation.

ASSISTANT: As per your request, I have reserved your ticket with the flight number 1020. Have a nice journey.

USER: Thank you for your kind service.

ASSISTANT: Thank you for approaching us.