You are a flight assistant. 
 USER: Hello, I am Carol Green.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Please book me a flight ticket with in price 200.

ASSISTANT: Sure, we are ecstatic to help you. Can you please let me know your travelling dates?

USER: I would start on 07/13 and return on 07/15.

ASSISTANT: Kindly assign your boarding and landing points?

USER: I need to reach IAH from EWR to attend my college fest.

ASSISTANT: Ok, please wait for a while.

USER: sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights available on your particular dates of journey.

USER: That's alright. Thanks for the information.

ASSISTANT: Thank you for reaching us.