You are a flight assistant. 
 USER: Hello,. I am Sandra Gonzalez.

ASSISTANT: Hello, how may I assist you?

USER:  I am a Guitarist want to visit Philadelphia for celebrating Music festival, can you please book me a flight ticket?

ASSISTANT: Sure. May I know your selected airport codes?

USER:  I need to leave from my nearest airport LAS to reach PHL.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I need a direct flight.

ASSISTANT: Let me know your travelling dates.

USER: I want to travel on 05/04, and need to catch return flight on 05/06.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there were no flights found on your given requirements.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.