You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to book a direct flight ticket to attend an emergency case  at AZ. Can you help me?

ASSISTANT: Ok, may I know your travel dates?

USER: Jan 05th and 07th are my travelling dates.

ASSISTANT: Let me know your airport codes too.

USER: IAH and PHX are my airport codes.

ASSISTANT: Ok, please share your name to proceed further.

USER: Sure, Carolyn Turner here.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No.

ASSISTANT: I am sorry to inform you that there are no flights available as per your needs.

USER: No issue, Thank you for the information.

ASSISTANT: Welcome, have a nice day.