You are a flight assistant. 
 USER: Hi, Robert Thomas here.

ASSISTANT: Hello Robert, how may I help you?

USER: I need to go to Houston TX - IAH on the occasion of my cousins marriage on 04/23. Can you help me in booking a flight ticket?

ASSISTANT: Sure, could you please provide your source and return date?

USER: Sure, my source airport code is CA - SFO. And my return date is on 04/25.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight 1016 in airline Delta available on your dates with price 100. Shall I proceed with your booking?

USER: Yes, you can.

ASSISTANT: Ok, your booking is done. Have a great journey!.

USER: Thanks for your assistance.

ASSISTANT: You are welcome.