You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I have to go Houston to meet my sister after a long time so please help me with flight ticket booking from IAD to IAH.

ASSISTANT: Sure, I will help you. May I know your trip dates please?

USER: Thank you. I have planned my travel dates as May 13 and May 15.

ASSISTANT: Ok, do you have any specifications?

USER: I am looking for single connecting flight so please check with that.

ASSISTANT: Ok, please share your other preferences is any.

USER: No, I do not have any more specifications.

ASSISTANT: Ok, please tell me your name.

USER: Sure, myself Gregory Thomas.

ASSISTANT: Ok, please give me a minute.

USER: Sure, take your time.

ASSISTANT: There is a flight-1020 which is having a connection limit 1 and the ticket cost is 100. Shall I proceed to book the ticket?

USER: That is fine, please proceed with booking.

ASSISTANT: I have booked the ticket with the above flight in the Southwest Airlines.

USER: Thank you for your help.

ASSISTANT: Have a nice journey. Thank you for choosing us.