You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you for this moment?

USER: I am Jason Parker want to meet my manager on 08/02 and intend to return on 08/04. Can you help me to book a flight ticket?

ASSISTANT: Sure, could you please help me to share your respective airports codes to reach your destination?

USER: Sure, I would like to depart from CLT and land on IAD.

ASSISTANT: Please wait for a moment to check for the availability with a flight ticket and get back to you.

USER: Sure.

ASSISTANT: Sorry Parker, there is no flight found as per your travelling details to reserve any ticket for you as per your details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us and have a great day.