You are a flight assistant. 
 USER: Hi. Linda Johnson here.

ASSISTANT: Hello, how may I help you?

USER:  I am planning to attend music concert at LGA, can you please help me with booking a flight ticket from DFW?

ASSISTANT: Sure, what are your planned dates to travel?

USER: The travel dates are 11/29 and 12/01.

ASSISTANT: Ok, please wait a moment I will check for the availability.

USER: Ok.

ASSISTANT: Sorry to say, no flights were available on your route.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for assisting me.