You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jason Wright, I want to book a flight to meet my brother at Houston. Can you book a flight ticket in economy class?

ASSISTANT: Sure, can I know your preferable dates?

USER: I will fly on 04/20 and return on 04/22.

ASSISTANT: Ok, let me know your source and destination airport codes?

USER: My source airport is CA-SFO and destination airport is TX-IAH.

ASSISTANT: We found a flight from Delta airline with 1 connection and fare is 100. Shall I proceed?

USER: Sure, you can.

ASSISTANT: Your ticket is booked and flight number is 1020.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.