You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ronald Brown.

ASSISTANT: Yes Brown, what can I do for you?

USER: I have to attend the baby shower program at my uncle's house on 04/02. Can you please book a flight ticket for me?

ASSISTANT: Sure, may I know your airport codes?

USER: Yes, it's from EWR to HOU.

ASSISTANT: May I know your departure date?

USER: I will return on 04/04.

ASSISTANT: Ok, let me check the availability.

USER: Ok.

ASSISTANT: Sorry Brown, there is no flight found with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.