You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Virginia Walker.

ASSISTANT: How can I help you Walker?

USER: Can you help me booking flight from BOS to PHX?

ASSISTANT: Can I know your trip dates?

USER: My trip dates are 05/22 and 05/24.

ASSISTANT: Please  wait for a while. Sorry, there is no flight available for you.

USER: Oh! It's ok, no problem thank you for your services.

ASSISTANT: Thank you for contacting us.