You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Ruth Young.

ASSISTANT: Ruth, how can I assist you?

USER: I have to meet my boss at Houston, can you please book the flight ticket from DEN to HOU?

ASSISTANT: Sure, please share your journey dates.

USER: I have to depart on 06/22 and also book the return ticket on 06/24.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flight found.

USER: Not an issue, I will find an other way. Anyway thank you for checking.

ASSISTANT: Thank you for approaching us.