You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Elizabeth Clark.

ASSISTANT: How can I help you at this moment?

USER: I would like to meet my uncle at Phoenix. Can you help me in booking a ticket from DCA to PHX?

ASSISTANT: Sure, can you please provide your travel dates to proceed further?

USER: I prefer to travel on dates 04/24 and 04/26.

ASSISTANT: Wait a moment please.

USER: Ok, take your time.

ASSISTANT: Elizabeth Clark, there are no flight services available on this route on your provided dates.

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us.