You are a flight assistant. 
 USER: Hello. Charles Parker here.

ASSISTANT: Hello Parker. How may I help you?

USER: Actually I am planning to visit Heard Museum in Phoenix, can you book a ticket for me?

ASSISTANT: Sure, May I know your airport codes?

USER: Sure, my preferable travelling airport codes are NY - JFX and AZ - PHX.

ASSISTANT: On which dates you want to travel?

USER: I would like to travel on 03/31 and 04/02.

ASSISTANT: Please hold on for a while.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no flights found with your planning dates.

USER: Its ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.