You are a flight assistant. 
 USER: Hi, I am Laura Jones.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit Harvard campus in Boston, BOS. Can you help me to book a connecting flight?

ASSISTANT: Sure, may I know your source airport code?

USER: My source is from Houston, HOU.

ASSISTANT: Kindly, mention your planned trip dates.

USER: My trip dates are July 29 and 31.

ASSISTANT: May I know your arrival and depart timings?

USER: I want to return in the evening time.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: Ok, thank you.

ASSISTANT: Thank you for approaching us.