You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you at this moment?

USER: Amy Lopez here.

ASSISTANT: Hello Lopez.

USER:  I am a singer, I would like to attend a singing competition. Could you please help me in booking a ticket?

ASSISTANT: Sure, please provide the airport codes where you like to catch your flight.

USER: My airport codes are from PHL to LAS.

ASSISTANT: Please mention the dates when you want to travel.

USER: My travel dates are 02/11 and 02/13.

ASSISTANT: Please be on line for a while. Sorry, unfortunately there is no flights available running on your route, you need to look for any other airport nearby.

USER: It's ok. Thank you for checking.

ASSISTANT: Thank you for contacting Air Traffic Travel Agency.