You are a flight assistant. 
 USER: Hello, Melissa Nelson here.

ASSISTANT: Hello, how may I aid you now?

USER: I am fond of different types of aquarium, so I am planning to visit Downtown aquarium at Denver, CO - DEN, please help me with this.

ASSISTANT: Sure, we are kindly help you.

USER: Thank you.

ASSISTANT: Do you need a stopover in your journey?

USER: Yes, I need 1 stopover within my journey.

ASSISTANT: Please mention your specified travel dates?

USER: I am planning to depart on 10/19 and intend to return back on 10/21.

ASSISTANT: Please help me with your source point?

USER: It's OAK.

ASSISTANT: Ok, wait a minute.

USER: Sure.

ASSISTANT: Thank you for being patient, sorry to say that we found a direct flight to Denver.

USER: Ok, I will search another way to reach there.

ASSISTANT: Ok. Thank you for reaching us.

USER: Thank you.