You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can assist you now?

USER: I want to travel from LGA to DTW so, can you help me with booking flight ticket?

ASSISTANT: Sure, I will help you out. When are you planning to start and return?

USER: I am planning to start on Nov 12 and return on Nov 14.

ASSISTANT: Ok, please share your class preference.

USER:                   I am ok with any class.

ASSISTANT: Can I have your name please?

USER: My name is Paul Martinez.

ASSISTANT: Is there any other essentials to consider?

USER: No.

ASSISTANT: Ok, wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, no flights were found based on your schedule.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for availing us.