You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Joshua Allen. Can you please help me with flight ticket booking from HOU to BOS? As I would like to meet my friend in Boston.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, I need to travel on dates of 07/18 and 047/20.

ASSISTANT: Please give me a moment. Please re confirm your travel dates.

USER: Sure, I need to travel on dates of 07/18 and 07/20.

ASSISTANT: Thanks for waiting, there is no flights available on your preferable dates.

USER: Oh! it is sad to hear. Anyway, thank you for your time.

ASSISTANT: Welcome, have a great day.