You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Michael Turner here.

ASSISTANT: Yes Turner.

USER: Can you please book a flight ticket from PHX to DFW?

ASSISTANT: When you are going to start your journey?

USER: Sure, I need to travel on dates of 05/22 and 05/24.

ASSISTANT: Ok, wait for a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry for the inconvenience Turner, no flights as per your details.

USER: Oh! It is sad to hear.

ASSISTANT: Thank you for reaching us.

USER: Anyway, thank you for your time.