You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: Myself Donna Martinez. I want you to book a ticket from DCA-PHX.

ASSISTANT: Sure, may I know your dates of journey?

USER: On 06/30 to 07/02.

ASSISTANT: OK, please wait.

USER: No issues.

ASSISTANT: Sorry, Donna, there are no flights found as per your travelling details.

USER: Thank you.

ASSISTANT: Thank you, for contacting us.