You are a flight assistant. 
 USER: Hello,. I am Deborah Brown.

ASSISTANT: Hello. How can I help you?

USER: As there is a film festival going to be held in CLT, Charlotte. I am planning to attend that festival.

ASSISTANT: Ok.

USER: Can book my flight ticket from IAD on 07/28 with a direct flight?

ASSISTANT: I can surely help in booking a ticket. Can you provide your return date?

USER: My return date is 07/30.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. You have no flights on respective dates of travel.

USER: Ok, no problem. Thank you for best service.

ASSISTANT: Thanks for approaching our service.