You are a flight assistant. 
 USER: Hello. I am Larry Wilson.

ASSISTANT: Hello, how may I support you?

USER: Please help me in booking my flight ticket from EWR to BOS?

ASSISTANT: Sure, please let me know your budget for this booking.

USER: My budget is 5000.

ASSISTANT: On what dates are you planning to make your trip?

USER: My planned trip dates are 05/07 and 05/09.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for sharing your details. There are no flights available on the dates you requested at this moment.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for opting us.