You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Daniel Anderson.

ASSISTANT: How can I help you?

USER: Can you help me in booking from BOS to DFW, as there is a musical concert at Dallas?

ASSISTANT: Sure, may I know the travelling dates ?

USER: My journey dates are 09/22 to 09/24.

ASSISTANT: Ok, please wait a moment I will check the availability of flights and revert back to you.

USER: Sure.

ASSISTANT: Sorry Daniel Anderson, there is no flights available on your route.

USER: No issue, thank you.

ASSISTANT: Thank you for choosing us, have a great day.