You are a flight assistant. 
 USER: Hi. Amanda Wright here.

ASSISTANT: Hello. How may I help you today?

USER: I am looking for a flight ticket with price below 5000. Can you book it?

ASSISTANT: Sure, I am here to help you with that. Can I know your itinerary dates?

USER: My preferable dates for travel are 09/29 to 10/01.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Ok Wright, may I know your airport codes?

USER: My airport codes for boarding the flight are IAD to BOS.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.