You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gregory Evans.

ASSISTANT: How may I help you?

USER: Can you help me in booking a ticket from IAH to PHX with no connection?

ASSISTANT: Yes, I will help you in searching a flight. Please let me know your preferable dates?

USER: My dates of journey are 07/23 to 07/25.

ASSISTANT: Sorry Evans, there is no flight as per your dates. Can I check for other dates?

USER: Ok. No. Thank you for your time.

ASSISTANT: Ok. Thank you for choosing us, have a nice day.