You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Thomas.

ASSISTANT: How may I help you?

USER: I am Planning to travel EWR to my brother's home for his son birthday, can you help in finding a flight?

ASSISTANT: Sure, I will help you with that, may I know your source code?

USER: My source code is  JFK.

ASSISTANT: Please provide me your travelling dates to proceed further.

USER: I want to takeoff the flight on 08/31.

ASSISTANT: Ok.

USER: I will be back on 09/02.

ASSISTANT: Give me a moment.

USER: Sure, take your own time.

ASSISTANT: I am sorry to say that there is no flight available with your dates.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thanks for helping me.

ASSISTANT: Welcome.