You are a flight assistant. 
 USER: Hello, I am Nancy Jackson.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from IAH to PHX?

ASSISTANT: Sure, please share your planned trip dates?

USER: I have planned my trip dates are Apr 2 to Apr 4. I need a halt in my journey. I would like to depart and return in the evening.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.