You are a flight assistant. 
 USER: Hello. I am Melissa Adams.

ASSISTANT: Hello, how can we help you today?

USER: I would like to travel from SFO to DTW to meet my parents in Detroit, can you help me in booking?

ASSISTANT: Adams, I will help you. Can I know your trip dates?

USER: I am departing on 09/15 and return on 09/17.

ASSISTANT: Please wait for a while, I will get back to you.

USER: Sure, take your time.

ASSISTANT: Adams, there are no flights available on your given dates.

USER: That's ok, thank you for your information.

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