You are a flight assistant. 
 USER: Hello, My name is Brenda White.

ASSISTANT: Hello, how can I serve you?

USER: I want to book a ticket from DEN to BOS for attending an sport event as I am the member of the team. Can you help me in that?

ASSISTANT: Sure, please share your planned dates?

USER: My planned dates are 12/11 to 12/13, my price limit is 5000 with single connection.

ASSISTANT: Ok, please wait for a minute I will check and revert to you.

USER: Sure.

ASSISTANT: Thanks for being waiting. Sorry to say that, there were no flights matching with your criteria.

USER: Ok, Thank you for your information.

ASSISTANT: Thank you for reaching us.