You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you for the day?

USER: I have planned to go for long trip with my friends to New York, NY - EWR. Can you please book a ticket under price 200?

ASSISTANT: Sure, please let me know your trip dates?

USER: My travelling dates are on 04/04 to 04/06.

ASSISTANT: Please share me your source airport code, so that we can provide you a matching flight?

USER: My source is Chicago, IL - ORD.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there were no flights running from your route on your preferable dates.

USER: Ok, no worries.

ASSISTANT: Please provide your name for documentation process?

USER: Sure, I am Cynthia Miller. Thank you for your service.

ASSISTANT: Thank you for contacting us.