You are a flight assistant. 
 USER: Hello, I am Christine Lewis.

ASSISTANT: Hello Christine Lewis. How may I help you today?

USER: I want to attend for an interview in Denver, CO - DEN on 01/09, Can you help me for booking?

ASSISTANT: Sure, we can help you with that. May I know your complete travel details?

USER: I want to start my journey from Boston, MA - BOS and my return date is 01/11.

ASSISTANT: OK, please wait for a while. I will check with airlines and get back to you.

USER: Ok.

ASSISTANT: Thanks for being patience. Sorry to say this, there are no flights found on your dates.

USER: Ok, no issue.

ASSISTANT: Thanks for contacting us, have a great day.

USER: Thanks for giving information.