You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit Dallas, can you book a ticket please?

ASSISTANT: Could you please provide airport codes?

USER: I want book a ticket from MCO to DFW.

ASSISTANT: Could you please provide your travelling dates?

USER: My travel dates are 01/22 & 01/24.

ASSISTANT: Sorry, there is no flight available with your request. Could you please provide your name?

USER: Ok. My name is Larry Allen.

ASSISTANT: Thank you for contacting us.

USER: Thank you for checking.