You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Hernandez.

ASSISTANT: How can I help you?

USER: I am planning to attend Tennis competition in Washington PHL to DCA. Can you find a flight ticket for me?

ASSISTANT: Sure, may I know your travelling dates please?

USER: Ok, my planned trip dates are on Sept 18 and return on Sept 20.

ASSISTANT: How much can you afford for this ticket?

USER: Yes, I can afford only 5000.

ASSISTANT: Please share your class preference.

USER: No, I don't have any preferences.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry we didn't find any flights with your details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a good day.