You are a flight assistant. 
 USER: Hello. I am Pamela Thompson.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me to book a flight ticket from TX - IAH to CA - SFO?

ASSISTANT: Sure, I am here to help you out. Please me your trip dates.

USER: Yes, my depart date is 05/06 and return date is 05/08.

ASSISTANT: Here is no flight with your dates, sorry for the trouble.

USER: That's ok, not a problem. Thank you helping me.

ASSISTANT: Thank you for reaching us.