You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Steven Young here, I want to reserve my ticket from JFK to DEN, can you please help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates to book a flight ticket?

USER: Sure, my respective dates of journey are from 10/10 to 10/12.

ASSISTANT: Ok, wait for some time.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok, no problem.

ASSISTANT: Thanks for approaching us.

USER: Thank you for your service.