You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Debra Nelson here.

ASSISTANT: What type of service you are expecting from us?

USER: I want to reserve my ticket from HOU to BOS, can you please help me in booking?

ASSISTANT: Ok, I will help you. Can I know your travelling dates?

USER: Sure, my planned dates of journey are from Jul, 11 to Jul, 13.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a economy class.

ASSISTANT: Ok, do you have any other requirements?

USER: Yes, I need a connecting flight.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for your service.