You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that I can do for you?

USER: Brenda Carter here. I want to meet my grandparents, so please book my ticket from DFW to IAD.

ASSISTANT: Sure, I will help in that ticket booking. May I know the dates of your trip?

USER: My journey dates are 10/04 and 10/06.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: No airlines is providing a flight to reserve a seat to reach your destination. Sorry for the inconvenience.

USER: No problem, I will find an alternative way to travel.

ASSISTANT: Thank you for utilising our service.

USER: Thank you for helping me.

ASSISTANT: Welcome.