You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Melissa Nelson here.

ASSISTANT: Hello Nelson, how can I assist you?

USER: I would like to travel from DEN to HOU, to meet my grand father. Can you reserve a seat for me?

ASSISTANT: Sure, please let me know your journey dates?

USER: Ok, I am planning to travel on 10/19 and 10/21. I need a single connection limit.

ASSISTANT: Please hold on for a minute, I will be back with the flight details.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no flight available on your dates.

USER: It's ok, not an issue for me. Thank you for searching.

ASSISTANT: You are most welcome.