You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Andrew Johnson. I want to book a ticket from BOS to HOU, can you help me?

ASSISTANT: Sure, can you please let me know your travelling dates?

USER: My travel dates are 06/14 and 06/16.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: No problem, thanks for checking.

ASSISTANT: Thank you for approaching us.