You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Daniel Martinez. I am planning to travel from BOS to EWR, can you help in booking in flight?

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates are 03/26 to 03/28.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for opting us.