You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Kathleen Allen, I want to reserve my ticket from IAH to EWR, can you please help me in this?

ASSISTANT: Sure, may I know your trip dates please?

USER: Ok, my dates of journey are from 07/26 to 07/28.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Ok. Sorry, there is no flight available as per your request.

USER: Ok, no problem. Thank you.

ASSISTANT: Most welcome.