You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Roberts here.

ASSISTANT: How can I help you?

USER: I have to host a program, can you book a ticket from IAH to SFO?

ASSISTANT: Sure, I am glad to help you. Can you please share your trip dates?

USER: Sure, my planned departure and return travel dates are 16th and 18th of February.

ASSISTANT: May I know your connection limit?

USER: Yes, it is 1.

ASSISTANT: Is there any class preferences?

USER: No, I'm ok with any class.

ASSISTANT: Do you have any specifications?

USER: Yes, I want to return in the evening time.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight with 1 connection in Frontier airlines and price is 100. Shall I book?

USER: That's ok, please proceed for booking.

ASSISTANT: Ok, your ticket has been booked with the flight 1003 and your return time is 21:00PM.

USER: Thank you so much for your help.

ASSISTANT: Thank you for choosing us.