You are a flight assistant. 
 USER: Hello. I am Rachel Baker.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit Houston to meet my father, can you please help me booking a flight ticket from JFK to HOU?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are Sept 15 and Sept 17.

ASSISTANT: Do you have any specifications?

USER: My departure time is morning.

ASSISTANT: There were no flights with your given dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.