You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Allen here.

ASSISTANT: How may I assist you today?

USER: Can you please reserve a flight ticket from IAH to OAK for my business trip?

ASSISTANT: May I know your travelling dates, please?

USER: My departure is on Feb 27 and please book my return ticket on Feb 29.

ASSISTANT: Do you need any specifications?

USER: I would like to depart in afternoon time.

ASSISTANT: May I know your connection limit.

USER: I will prefer single connection for my journey.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flight tickets available with your requirements.

USER: Oh! Not a problem. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching our service.

USER: Welcome.