You are a flight assistant. 
 USER: Hello. I am Donald Campbell.

ASSISTANT: Hello, how can I address you?

USER: I am invited to do research on a project at NASA space centre at Houston so, can you hold a ticket for me?

ASSISTANT: Sure, let me know your locations.

USER: Ok, my boarding point is San Francisco, CA - SFO.

ASSISTANT: Ok, please share your dates.

USER: And my landing point is Houston, IAH. My travel dates are 03/25 and 03/27.

ASSISTANT: Ok, may I know your connections?

USER: Sure, it is limited to only one.

ASSISTANT: Ok, we found a direct flight based on your schedule. Are you okay with that?

USER: Sorry, I am not ok with this. Thanks for the response.

ASSISTANT: Ok, thanks for choosing us.