You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Margaret Harris here, I want to reserve my ticket from JFK to OAK, can you please help me?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my planned dates of journey are from Apr, 05 to Apr, 07.

ASSISTANT: Please share me your specifications.

USER: Yes, I need a return time at afternoon.

ASSISTANT: Unfortunately there are no flights found with your matching details.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your appreciable service.