You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Daniel Perez here.

ASSISTANT: How can I assist you?

USER: I want to reserve my ticket from IAD to JFK, can you please help me in this?

ASSISTANT: Sure Perez, can I know the travel dates please?

USER: Sure, my planned dates of journey are from 03/15 to 03/17.

ASSISTANT: Ok, wait a moment please.

USER: Sure. I will wait for your response.

ASSISTANT: Sorry to say that, there are flights available as per your request.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your appreciable service.