You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from IAD to HOU for my trip, can you please reserve a flight ticket between those locations?

ASSISTANT: Sure, can I know your good name?

USER: Ok, please reserve it on the name of Ronald Hernandez.

ASSISTANT: Can you please help me with your travelling dates?

USER: Sure, my boarding is on Sept 24 and please book my return ticket on Sept 26.

ASSISTANT: Do you have any other specifications?

USER: I would prefer single connection for my journey.

ASSISTANT: Okay, wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for the information.

ASSISTANT: Thank you for reaching us.