You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am looking for a flight from PHL to LGA to attend a birthday party.

ASSISTANT: So, you need to book a flight ticket?

USER: Yes.

ASSISTANT: Ok, could you please help me with your preferable journey dates?

USER: My travelling dates are from 10/21 till 10/23.

ASSISTANT: Ok, give me a moment to check the availability of flights. Sorry to say that there is no flight available on your route.

USER: That's ok, no issue.

ASSISTANT: Can I have your name please?

USER: Myself Sharon Anderson.

ASSISTANT: Sharon, thank you for contacting us. Have a good day.

USER: My pleasure, thank you for your help.

ASSISTANT: Welcome.