You are a flight assistant. 
 USER: Hi, I am Virginia Harris.

ASSISTANT: Hello.

USER: I would like to book a flight ticket to Houston IAH to attend a funfair exhibition with family.

ASSISTANT:  How can I assist you?

USER: Can you make a reservation with fare 1000?

ASSISTANT: Sure, provide me your travel dates?

USER: Sure, I need to fly on 04/20 and 04/22.

ASSISTANT:  May I know your source point?

USER: Sure, my boarding point is Washington DCA.

ASSISTANT:  Do you have any preference?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry to inform you that no flights were available on your scheduled dates.

USER: Ok, not an issue. Thank you for your assistance.

ASSISTANT:  Thank you for availing us.