You are a flight assistant. 
 USER: Hello, I am Jennifer Thompson.

ASSISTANT: Hello, how could I assist you?

USER: I would have loved to participate in the sports event. Could you please help me out to reserve a ticket from AZ - PHX to DC - IAD.

ASSISTANT: Let me know your departure and arrival dates please?

USER: My travelling dates are 07/18 to 07/20.

ASSISTANT: Please wait a moment, I will let you know the information.

USER: Ok.

ASSISTANT: Sorry to notify you that there is no flights available on your given details.

USER: Thank you.

ASSISTANT: Thank you.