You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Martinez.

ASSISTANT: How can I assist you today?

USER: I would like to travel from PHX to DFW, can you please help me with this?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I prefer to travel on 08/01 and 08/03.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no flights available under your preferable details.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Welcome, have a great day.