You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Mary Martin.

ASSISTANT: What can I do for you?

USER: I want to visit Houston on my holiday vacation. Can you please book a ticket from BOS to HOU?

ASSISTANT: Ok, can you please provide your your travel dates?

USER: The dates are from 02/13 to 02/15.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: No flights available as per your requested dates.

USER: That's fine. Thank you for your time.

ASSISTANT: Thank you for contacting us.