You are a flight assistant. 
 USER: Hello. I am Patricia Parker.

ASSISTANT: Hello, how can I support you for the day?

USER: As I am a singer, I got an invitation to attend as a judge for singing competition.

ASSISTANT: Ok.

USER: Can you please book a direct flight for me?

ASSISTANT: Sure, I am ecstatic to help you. Can I have your airport codes please?

USER: Source code is Boston, BOS. Destination is Charlotte, CLT.

ASSISTANT: May I know your schedule dates of journey?

USER: Trip dates are 06/27 to 06/29.

ASSISTANT: Please, wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Unfortunately, there were no flights available with your specified requirements.

USER: No issues. Thank you.

ASSISTANT: Thank you for contacting us.