You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jonathan Martinez here.

ASSISTANT: How may I assist you?

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

ASSISTANT: Sure, when would you like to plan your journey?

USER: Sure, my planned dates of journey are from Aug, 10 to Aug, 12.

ASSISTANT: May I know your name please? Do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: Yes, I need a business class.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Jonathan Martinez, no flights has been found on your preferences.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for approaching us.