You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I would like to change my recent reservation, will you help me with that?

ASSISTANT: Sure, may I know your name?

USER: Myself Samantha Wilson.

ASSISTANT: I found your recent reservation, please provide your airport codes.

USER: My airport codes are HOU and SFO.

ASSISTANT: May I know your journey dates?

USER: My travelling dates are Oct 28 and Oct 30.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any specifications?

USER: No, thank you for asking.

ASSISTANT: Sorry Samantha Wilson, no flights are available on your route.

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

ASSISTANT: Thank you for contacting us.