You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please help me in booking a flight ticket from IAH to SFO.

ASSISTANT: Sure, I'm glad to help you with that. May I know your planned departure and return travel dates please?

USER: I want to take off on 05 Oct and return on 07 Oct.

ASSISTANT: Do you need break in between your journey?

USER: I need a break in between journey.

ASSISTANT: Please let me know if you have any other specifications.

USER: I prefer to depart in the morning.

ASSISTANT: May I know your good name please?

USER: I am Nicholas Wilson.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.