You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned dates of journey are from Jul, 04 to Jul, 06.

ASSISTANT: Do you have any limits on number of connections?

USER: Yes, I want a connecting flight.

ASSISTANT: May I know your name for the documentation purpose?

USER: Sure, my name is Sandra Gonzalez.

ASSISTANT: Do you have any another specifications on your journey?

USER: Not required.

ASSISTANT: Sorry,  we regret to inform you that there is no flight available as per your request.

USER: Ok, not an issue.

ASSISTANT: Welcome, thank you for reaching us.