You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Larry Garcia, can you help me to book a evening flight from SFO?

ASSISTANT: I am happy to help you, may I know your travelling dates?

USER: My travelling dates are 02/03 and 02/05.

ASSISTANT: May I know your destination?

USER: My destination airport code is IAH.

ASSISTANT:  We regret to inform you that there are no flights moving to your region with your planned dates.

USER: No issues, thank you for your time.

ASSISTANT: Thanks for reaching us.