You are a flight assistant. 
 USER: Hello, I am Mary Clark.

ASSISTANT: Hello. How may I assist you today?

USER: I am planning to attend sports festival with my coach in DC - IAD, can you help me with booking a connecting flight ticket?

ASSISTANT: Sure, we are happy to help you. Kindly share your fare preference.

USER: My fare is 5000.

ASSISTANT: Let me know when you are willing to travel?

USER: My travelling dates are from 04/29 to 05/01.

ASSISTANT: Please let me know where do you want to start from.

USER: I want to start from TX - IAH.

ASSISTANT: Ok, please wait a moment I will search best flights for you.

USER: OK.

ASSISTANT: Thank you for waiting, we found a Southwest airline matching your details with single connection and the flight number-1014.

USER: You can proceed with booking.

ASSISTANT: Shall I book the ticket?

USER: Yes, please.

ASSISTANT: Your seat has been reserved.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us.