You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help do you require from our flight agency?

USER: I am Pamela Andre son, I need a flight booking for attending my friend's engagement party, can you book a ticket for me?

ASSISTANT: Yes, I am happy to help you. Can I have your preferable airport codes to travel please?

USER: I will be taking off from DCA, and I want reach to LAS.

ASSISTANT: Ok, please let me know how long will you travel?

USER: My travelling dates will be from 06/29 to 07/01.

ASSISTANT: Ok, please allow me some time, so that I can check the availability.

USER: Take your own time.

ASSISTANT: Sorry to inform you Pamela, there are no flights running in your route.

USER: Oh! that's sad to hear from you.

ASSISTANT: Do you need any other help?

USER: No, anyways thanks for checking.

ASSISTANT: You are welcome. Thank you so much for connecting our services.